text: import ascii from "rollup-plugin-ascii";
  import node from "rollup-plugin-node-resolve";
  import {terser} from "rollup-plugin-terser";
  import * as meta from "./package.json";
  
  const copyright = `// ${meta.homepage} v${meta.version} Copyright ${(new Date).getFullYear()} ${meta.author.name}`;
  
  function onwarn(message, warn) {
    if (message.code === "CIRCULAR_DEPENDENCY") return;
    warn(message);
  }
  
  export default [
    {
      input: "index.js",
      external: Object.keys(meta.dependencies || {}).filter(key => /^d3-/.test(key)),
      output: {
        file: "dist/d3.node.js",
        format: "cjs"
      },
      onwarn
    },
    {
      input: "index.js",
      plugins: [
        node(),
        ascii()
      ],
      output: {
        extend: true,
        banner: copyright,
        file: "dist/d3.js",
        format: "umd",
        indent: false,
        name: "d3"
      },
      onwarn
    },
    {
      input: "index.js",
      plugins: [
        node(),
        ascii(),
        terser({output: {preamble: copyright}})
      ],
      output: {
        extend: true,
        file: "dist/d3.min.js",
        format: "umd",
        indent: false,
        name: "d3"
      },
      onwarn
    }
  ];
  